Chemical formulae and equations

Question 1

what are the chemical formulas for ammonium, silver, zinc, hydroxide, nitrate, sulfate, carbonate? (not in periodic table)

Answer 1

Ammonium: NH4+
Silver: Ag+
Zinc: Zn^2+
Hydroxide: OH-
Nitrate: NO3-
Sulfate: SO4^2-
Carbonate: CO3^2-

Question 2

how can the chemical formulae of ionic compounds be obtained?

Answer 2

they can be obtained by balancing the charges of the ions

Question 2

which elements are diatomic in the periodic table?

Answer 2

hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, iodine, astatine

Question 3

what are the chemical formulas for these covalent substances, ammonia, sulfur trioxide, nitrogen monoxide?

Answer 3

NH3, SO3, NO (all compounds)

Question 3

what do the ionic charges represent?

Answer 3

they represent how many electrons the atom has to gain or lose to attain full valence shell

Question 3

which elements usually share electrons instead of gaining or losing electrons?

Answer 3

group 14 elements

Question 4

which elements already have full valence shells?

Answer 4

group 18 elements (noble gases)

Question 5

which atoms are polyatomic?
(not in periodic table

Answer 5

ammonium, hydroxide, nitrate, sulfate, carbonate